208136238754 has 12 divisors (see below), whose sum is σ = 330573545442. Its totient is φ = 97945213440.

The previous prime is 208136238743. The next prime is 208136238763. The reversal of 208136238754 is 457832631802.

It can be written as a sum of positive squares in 3 ways, for example, as 176975869225 + 31160369529 = 420685^2 + 176523^2 .

It is a junction number, because it is equal to n+sod(n) for n = 208136238698 and 208136238707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2621074 + ... + 2699314.

Almost surely, 2^208136238754 is an apocalyptic number.

208136238754 is a deficient number, since it is larger than the sum of its proper divisors (122437306688).

208136238754 is an frugal number, since it uses more digits than its factorization.

208136238754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156501 (or 78260 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 208136238754 in words is "two hundred eight billion, one hundred thirty-six million, two hundred thirty-eight thousand, seven hundred fifty-four".